N.R. Goodman, soft back, 75 pages, Province of Nova Scotia Department of Mines, Memoir No. 1. Halifax, 1952.

This report comprises a considerable portion of a thesis which was submitted at Oxford University for the degree of Doctor of Philosophy. In the thesis work a study was made of gypsum and anhydrite in the field and at the same time a series of experiments was conducted in the laboratory to support the field investigations. These experiments, which are essentially a study of the stability ranges of the various forms of calcium sulphate, are still being carried on and the results will be published at a later date. The present report covers the field work and the description of the collected specimens.